#!/usr/bin/python

# Copyright (c) 2009, Purdue University
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"""Remove dns server, dns server set tool for Roster"""


__copyright__ = 'Copyright (C) 2009, Purdue University'
__license__ = 'BSD'
__version__ = '0.5'


import os
import sys
import getpass

from optparse import OptionParser

from roster_user_tools import cli_common_lib
from roster_user_tools import roster_client_lib


def main(args):
  """Collects command line arguments.

  Inputs:
    args: list of arguments from the command line
  """
  parser = OptionParser()

  parser.add_option('-d', '--dns-server', action='store', dest='dns_server',
                    help='Modify a DNS server.', default=None)
  parser.add_option('-e', '--dns-server-set', action='store',
                    dest='dns_server_set', help='Modify a DNS server set.',
                    default=None)
  parser.add_option('-s', '--server', action='store', dest='server',
                    help='XML RPC Server URL.', metavar='<server>',
                    default='https://localhost:8000')
  parser.add_option('-u', '--username', action='store', dest='username',
                    help='Run as a different username.', metavar='<username>',
                    default=unicode(getpass.getuser()))
  parser.add_option('-p', '--password', action='store', dest='password',
                    help='Password string, NOTE: It is insecure to use this '
                         'flag on the command line.', metavar='<password>',
                    default=None)
  parser.add_option('-c', '--cred-file', action='store', dest='credfile',
                    help='Location of credential file.', metavar='<cred-file>',
                    default=os.path.join(os.path.expanduser('~'), '.dnscred'))
  parser.add_option('--cred-string', action='store', dest='credstring',
                    help='String of credential.', metavar='<cred-string>',
                    default=None)
  parser.add_option('-q', '--quiet', action='store_true', dest='quiet',
                    help='Suppress program output.', default=False)


  (globals()["options"], args) = parser.parse_args(args)

  cli_common_lib.CheckCredentials(options)

  if( options.dns_server_set and options.dns_server ):
    core_return = roster_client_lib.RunFunction(
        u'RemoveDnsServerSetAssignments', options.username,
        credfile=options.credfile, credstring=options.credstring,
        server_name=options.server, args=[options.dns_server,
        options.dns_server_set])['core_return']

    if( not options.quiet and core_return ):
      print ('REMOVED DNS SERVER SET ASSIGNMENT: dns_server_set: %s '
             'dns_server: %s' % (options.dns_server_set, options.dns_server))
    elif( not core_return ):
      cli_common_lib.DnsError(
          'DNS server set assignment "%s/%s" does not exist.' % (
              options.dns_server_set, options.dns_server), 1)

  elif( options.dns_server_set ):
    core_return = roster_client_lib.RunFunction(
        u'RemoveDnsServerSet', options.username, credfile=options.credfile,
        credstring=options.credstring, server_name=options.server,
        args=[options.dns_server_set])['core_return']

    if( not options.quiet and core_return ):
      print 'REMOVED DNS SERVER SET: %s' % options.dns_server_set
    elif( not core_return ):
      cli_common_lib.DnsError(
          'DNS server set "%s" does not exist.' % options.dns_server_set, 1)

  elif( options.dns_server ):
    core_return = roster_client_lib.RunFunction(
        u'RemoveDnsServer', options.username, credfile=options.credfile,
        credstring=options.credstring, server_name=options.server,
        args=[options.dns_server])['core_return']

    if( not options.quiet and core_return ):
      print 'REMOVED DNS SERVER: %s' % options.dns_server
    elif( not core_return ):
      cli_common_lib.DnsError(
          'DNS server "%s" does not exist.' % options.dns_server, 1)
  else:
    parser.print_help()
    cli_common_lib.DnsError('Must specify a flag.', 1)

if __name__ == "__main__":
  main(sys.argv[1:])
